EPA Faces Push From Science Advisers To Broaden Coarse PM Standard

EPA's science advisers are urging the agency to address both rural and urban air pollution in its proposal to regulate coarse particulate matter (PM), arguing EPA may have misunderstood the advisers' initial recommendations by proposing to exempt agricultural and mining sources in rural areas. EPA's Clean Air Scientific Advisory Committee (CASAC) sent a March 21 letter to EPA Administrator Stephen Johnson raising concerns with the coarse PM proposal, which EPA issued in December alongside a proposed standard for smaller, fine...